Search results for "Minimum"
showing 10 items of 327 documents
2016
AbstractAuthigenic carbonate build-ups develop at seafloor methane-seeps, where microbially mediated sulphate-dependent anaerobic oxidation of methane facilitates carbonate precipitation. Despite being valuable recorders of past methane seepage events, their role as archives of atmospheric processes has not been examined. Here we show that cyclic sedimentation pulses related to the Indian monsoon in concert with authigenic precipitation of methane-derived aragonite gave rise to a well-laminated carbonate build-up within the oxygen minimum zone off Pakistan (northern Arabian Sea). U–Th dating indicates that the build-up grew during past ~1,130 years, creating an exceptional high-resolution a…
Waterless Cleaning Compositions with Disinfection Properties: Efficacy and Environmental Aspects / Bezûdens Tîrîðanas Lîdzekïi Ar Dezinficçjoðo Iedar…
2015
Abstract The microbial ecology of different indoor environments determines the human microbiome. Hence, cleaning and disinfection of indoor environments like hospitals, apartments, automobiles, etc. are of great importance. Nonaqueous surface cleaning preparations (SCPs) are often used for this purpose. A cleaning composition may contain the following compounds: primary surfactant, cosurfactant, solvent, cosolvent, organotropic (organic solubilizing) agent, hydrotropic (water solubilising) agent, water and salts, and special additives. In this paper, the efficacy of complex preparations is discussed, focusing on the chemical composition and testing methods. Particular attention is paid to q…
Statistical Multivariate Techniques for the Stock Location Assignment Problem
1998
In previous papers we proposed to apply multivariate statistical methodologies, like Multidimensional Scaling (MDS) and Seriation to the stock location assignment problem of a warehouse, often solved by considering the Cube per Order Index (COI). In this paper we compare the results by MDS, Seriation, a COI based method and the Maximum Path criterion, considering the data of a whole year of a Sicilian supermarket chain warehouse. The comparison is based on the simulated times to satisfy a sample of real orders.
Evolution of worldwide stock markets, correlation structure and correlation based graphs
2011
We investigate the daily correlation present among market indices of stock exchanges located all over the world in the time period Jan 1996 - Jul 2009. We discover that the correlation among market indices presents both a fast and a slow dynamics. The slow dynamics reflects the development and consolidation of globalization. The fast dynamics is associated with critical events that originate in a specific country or region of the world and rapidly affect the global system. We provide evidence that the short term timescale of correlation among market indices is less than 3 trading months (about 60 trading days). The average values of the non diagonal elements of the correlation matrix, corre…
Variabilidad en la utilización de los servicios de urgencias hospitalarios del Sistema Nacional de Salud
2010
ResumenObjetivoLos objetivos de este estudio fueron estimar las tasas de frecuentación a los servicios de urgencias hospitalarios (SUH) del Sistema Nacional de Salud (SNS) por áreas de salud, el porcentaje de ingresos, las razones estandarizadas de utilización de urgencias y analizar la relación con los recursos hospitalarios.MétodosEstudio ecológico combinando información de diversas fuentes (Encuesta de Establecimientos Sanitarios con Régimen de Internado 2006 y Conjunto Mínimo de Datos Básicos 2006) para estimar la frecuentación a los SUH y el porcentaje de ingresos asociado en 164 áreas de salud de 14 comunidades autónomas (CC.AA.).ResultadosLos 35,3 millones de habitantes de las 164 ár…
Neatliekamās medicīniskās palīdzības sniegšana Ārkārtas stāvokļa laikā
2022
Bakalaura darbā: “Neatliekamās medicīniskās palīdzības sniegšana ārkārtas stāvokļa laikā” pētīti tādi jautājumi kā neatliekamās medicīniskās palīdzības tiesiskais tvērums, tostarp neatliekamās medicīniskās palīdzības vēsture, Latvijas Republikas Satversmes 111. pantā ietvertā medicīniskā palīdzības minimuma saturs un tā saistība ar neatliekamo medicīnisko palīdzību. Tā pat tiek aplūkots, vai un kāda ir atšķirība starp ārkārtas stāvokli, ārkārtēju situāciju un izņēmuma stāvokli, kā arī aprakstīta neatliekamās medicīniskās palīdzības sniegšanas problemātika ārkārtas stāvokļa laikā. Darbā ir veikta nacionālo un starptautisko normatīvo aktu izpēte, kas saistīti ar ārkārtējo stāvokli un veselība…
Iedzīvotāju ienākuma nodoklis
2020
Bakalaura darba mērķis ir izpētīt un izanalizēt iedzīvotāju ienākuma nodokļa principus, veikt iedzīvotāju ienākuma nodokļa piemērošanas analīzi algas nodokļa maksātājiem un saimnieciskās darbības veicējiem, izpētīt un izvērtēt iedzīvotāju ienākuma nodokļa plānošanas un prognozēšanas iespējas, izdarīt secinājumus un izstrādāt priekšlikumus nodokļa piemērošanā un plānošanā, un prognozēšanā. Latvijā ir noteikti 15 dažāda veida nodokļi, kurus uzliek saskaņā ar kokrētā nodokļa likumu, un kuri veido Latvijas nodokļu un nodevu sistēmu. Iedzīvotāju ienākuma nodoklis un uzņēmumu ienākuma nodoklis veido vienotu ienākuma nodokļu sistēmu. Iedzīvotāju ienākuma nodoklis ir nodoklis ar ko apliek fiziskas …
A kriging interpolation strategy for the optimization of Acidithiobacillus ferrooxidans biomass production using fed-batch bioreactors
2008
In this work, a procedure for the optimization of Acidithiobacillus ferrooxidans biomass production in fed-batch reactors using a model based on optimal spatial interpolation of experimental data is proposed. The approach is useful in those cases where specific growth and substrate consumption rates are unknown. Based on interpolation, the optimal values of biomass and substrate concentrations set points are obtained at the minimum of 2-dimensional cost function. In the fed-batch reactor biomass and substrate concentrations are controlled at their set points by changing the input flow and its concentration. We propose a minimum variance control strategy which improves the classical proporti…
Performance of the ATLAS detector using first collision data
2010
More than half a million minimum-bias events of LHC collision data were collected by the ATLAS experiment in December 2009 at centre-of-mass energies of 0.9 TeV and 2.36 TeV. This paper reports on studies of the initial performance of the ATLAS detector from these data. Comparisons between data and Monte Carlo predictions are shown for distributions of several track- and calorimeter-based quantities. The good performance of the ATLAS detector in these first data gives confidence for successful running at higher energies.
Pileup and underlying event mitigation with iterative constituent subtraction
2019
Abstract The hard-scatter processes in hadronic collisions are often largely contaminated with soft background coming from pileup in proton-proton collisions, or underlying event in heavy-ion collisions. This paper presents a new background subtraction method for jets and event observables (such as missing transverse energy) which is based on the previously published Constituent Subtraction algorithm. The new subtraction method, called Iterative Constituent Subtraction, applies event-wide implementation of Constituent Subtraction iteratively in order to fully equilibrate the background subtraction across the entire event. Besides documenting the new method, we provide guidelines for setting…